/Engine/Source/Developer/MeshMergeUtilities/Public/MeshMergeDataTracker.h
Adds or retrieves raw mesh data for the mesh and LOD index
[FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & AddAndRetrieveRawMesh ( int32 MeshIndex, int32 LODIndex, [UStaticMesh](API\Runtime\Engine\Engine\UStaticMesh) * InMesh )